Arrangement for tightening piston-rings.



BEST AVAILABLE COPY No. 891,317. RATRNTRD JUNE 2a, 1908.

K. WILLNER. ARRANGEMENT FOR TIGHTENING PISTON RINGS.

APPLIOATION FILED MAY 26, 1906.

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No. 891,317. PATENTED JUNE 23, 1908'- K. WILLNER.

ARRANGEMENT'FOR TIGHTENING PISTON RINGS.

APPLIOATION FILED MAY 2a, 1906.

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I I v v %/1u KARL WILLNER, or GoRLITz, GERMANY.

ARRANGEMENT FOR 'lIGHTENING PISTON-RINGS.

Specification of Letters Patent.

Application filed May 25, 1906.

Patented June 23, 1908.

Serial No. 318,755.

To all whom it may concern:

Be it known thatI, KARL WILLNER, monteur, a subject of the King of Prussia and German Emperor, residing at Gorlitz, Bahnhofstrasse 23, in the Kingdom of Prussia and German Empire, have invented certain new and useful Improvements in Arrangements for Tightening Piston-Rings, of which the following is a specification.

The present invention refers to an arrange ment for tightening the piston rings in engines with reciprocating pistons particularly in stationary steam engines, "locomotives, and the like.

The present invention has the purpose to allow of quickly readjusting the piston rings uniformly to all sides, without it being necessary to remove the piston from the cylinder in which it works, or even the cylinder head.

In the accompanying drawings a mode of carrying out the present invention is exemplified, Figure 1 being the top view of the upper half of the piston, consisting of two parts joined in a line at right angles to the piston rod. Fig. 2 is a section through the piston and part of the surrounding cylinder, in direction of the piston rod. Fig. 3 is a bottom view of the other half of the piston. Figs. 4 and 5 show the tightening arrangement in plan andside view, Figs. 6 and 7 on a larger scale one of the wedges operating the tightening arrangement in front and top view. Fig. 8 is a side view of the arrangement for operating the wedges, Fig. 9 is a side view of the spanner used for turning said arrangement.

The piston reciprocating in the cylinder '1 is secured by means of screw 2 or other suitable means to the piston rod 3- and consists of two parts 4 and 5 connected with each other by means of screws 6 arranged in a circle concentric with the aXis of the piston rod. Part 5- carries a boss 7- having a shoulder at its upper end and a number of eyes 8- corresponding to the connecting screws, by means of which parts -4 and 5 are held together in such a manner that a hollow space 9 is formed for receiving the elastic piston rings and the below described arrangement for tightening said piston rings. place of several piston rings also one single elastic piston ring can be used.

The piston rings 10- are continuously forced outwards by means of an elastic ring 1 1 made of steel or other suitable material, and cut open at two places diametrically opposite each other, said ring resting against the inside surface of the piston ring. The ends of the ring -11 which meet, are suitably made to overlap in a manner shown in Fig. 5 their joints being covered on the inside by means of fish plates -llriveted to one of the ends and lying loose against the other.- Instead of a ring split in two parts also rings split into several parts can of course be employed, when however all parts should be of equal length. Ring 11- is connected by means of a number of radially arranged and suitably exchangeable springs 12 with two or more concentrically to the piston center provided straps 13- which have radial flanges at their ends 14. In the design shown in the drawings 8 such springs 12 are provided which are suitably arranged between each two of the screws 6. of the straps 13 form wedge shaped guides pointing towards the center of the piston to take the adjusting Wedges 15-, Fig. 6 and 7, the inside edges of said flanges resting each pair together against surfaces -16 straight and parallel to the axis of the piston rod, which surfaces are suitably provided on the boss 7 of the piston, Fig. 1 on the Wedges being tightened these flanges will be forced out. The wedges 15 have a trapezoidal section and have shoulders l7 on top and bottom, intended as guides for the wedges in corresponding grooves -18, 19 of the piston parts 4-, 5-. The wedges15- are moved by means of eccentrics -21-, 2l' on bolts 2O pivotally arranged in the piston parts -4, 5, Fig. 8, said eccentrics 2 1 working against the outer surfaces of wedges 15. The upper ends of -the bolts 20 are made as square heads 22- to take a socket wrench 23, Fig. 9, for turning the bolt 20- or the eccentric -2-1 respectively. At its lower end the bolt 20- carries a ratchet wheel -2l arranged in a suitably provided recess -2.5 in thepart '5, and meshing with a catch or pawl -26- under action of a spring, so that eccentric 21 and. bolt 20 are prevented from turning back.

In the cylinder head 27- holes are provided corresponding with the eccentric spindles, said holes being ordinarily closed by means of screw plugs 28 and when open allowing of inserting the wrench 23 for The flanges 14 (ii c4 turning the eccentric and thereby tightening the piston rings, without the cylinder heads having to be removed. On the cylinder head or on the part 4- a graduation can be provided, which will facilitate a uniform adjustment of the eccentric the wrench -23- being provided with a toothed wheel --29-* Fig. 9, the division of which and the pitch circle of which is equal to that of the ratchet wheel 24, so that it can be ascertained from outside, by how many teeth the eccentric has been turned.

On turning the eccentrics 2 1 the wedges 15 are movedbetween the flanges 14 of straps 13 towards the inside and thereby bend the said straps and move them towards the outside so that by means of the springs 12- and the elastic ring 11 the packing rings 10-- are forced quite evenly to the wall of the cylinder all around. When after some time the pack ing rings are worn, they can be easily readjusted without having to remove the cylinder head.

Owing to the constant and uniform pressure of the packing rings, a considerable amount of coal and steam is saved, the walls of the cylinder is not worn one sided or unevenly, and as the packing has nowhere to do any overwork, it will wear very slowly, and so greatly reduce the costs for repairs. Furthermore the pistons are more easily fitted into the cylinder.

Having now described my invention, what I claim and desire to secure by Letters Patent of the United States is:

1. In combination with a two-part piston for reciprocating engines packing rings supported by a plurality of radial springs, circu lar straps supporting the inner ends of said springs, converging flanges provided at the ends of said straps and means for forcing outward or relieving said flanges substantially as described.

2. In combination with a two-part piston for reciprocating engines packing rings supported by a plurality of radial springs, circular straps supporting the inner ends of said springs converging flanges provided at the ends of said straps guiding surfaces provided for the inner edges of said flanges at the boss of the piston and means for forcing outward or relieving said flanges, substantially as described.

3. In combination with a two-part piston for reciprocating engines packing rings supported by a plurality of radial springs, circular straps supporting the inner ends of said springs converging flanges provided at the ends of said straps guiding surfaces provided for the inner edges of said flanges at the boss of the piston, wedges guided in grooves of the piston intended to be pressed between the said flanges, and means for displacing saidwedges radially, substantially as described.

4. In combination, with a two-part piston for reciprocating engines rings supported by a plurality of radial springs, circular straps supporting the inner ends of said springs, converging flanges provided at the ends of said straps guiding surfaces provided for the inner edges of said flanges at the boss of the piston, wedges guided in grooves of the piston intended to be pressed between the said flanges, eccentrics mounted upon bolts within the hollow piston and pressing upon the outer faces of said wedges and means for turnin and tightening said. eccentrics, substantiefily as described.

5. In combination with a two-part piston for reciprocating engines packing rings supported by a plurality of radial springs, circular straps supporting the inner ends of said springs, converging flanges provided at the ends of said straps guiding surfaces provided for the inner edges of said flanges at the boss of the piston, wedges guided in grooves of the piston intended to be pressed between the said flanges, eccentrics mounted upon bolts within the hollow piston and pressing upon the outer faces of said wedges, the said bolts being provided with square heads at their free ends and with ratchet wheels meshing with a pawl, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two witnesses.

KARL WILLNER.

Witnesses KARL GOLDNER, PAUL WAMLETT. 

